Upon passage of an ordinance annexing territory to the city
the clerk shall record the ordinance with the register of deeds. The
clerk shall certify annually to the secretary of state and record
with the register of deeds a legal description of the total boundaries
of the city as those boundaries existed on December 1, unless there
has been no change in the 12 months preceding.

There shall be adopted an official map of the city consisting of
two sheets, which shall be and remain on file in the office of city
clerk, and which is made a part hereof by reference as follows: sheet
2 of 2 (street development plan), showing the location and width of
streets within the city limits; and sheet 1 of 2 (street expansion
plan), showing the location and width of the extension of the major
street system of the city into the adjacent unincorporated area over
which the city can exercise extraterritorial jurisdiction.

The council may, after a public hearing as provided in section 62.23(6)(c)
of the Wisconsin statutes, change or add to the official map of the
city so as to establish the exterior lines of planned new streets,
highways and parkways or to widen, narrow, extend or close streets,
highways or parkways.

To conserve the integrity of the official map, no building shall
be erected or located within the bed of any street or highway shown
on the official map unless a permit shall first have been applied
for and issued under section 62.23(6) of the Wisconsin statutes.